Door structure



March 25 V. A. JOHNSON noon STRUCTURE 3 Sheets-Sheet 1 INVENTOR.

1 H 70/1 228 a n March 25 1924.. 1,488,395

- v. A. JOHNSON DOOR STRQGTURE ATTORNEY.

Mmb 25 ,1924

v. A. JOHNSON DOOR STRUCTURE '3 Sheets-Sheet is INVENTOR.

- 'VOLEY A. JOHNSON, or

Patented Mar. 25, 1924.

UNITED s1;

was

Fries;

IE-ONTON, onro, nssrenon or oneram T0 LAWSON BLENK- 'nvsorr, or LExInGToN, KENTUCKY.

DOOR STRUCTURE. I

Application filed filed August 23, 1923.

Z '0 all whom it may concern.

Be it known that I, VoLuY A. JoHNsoN, a

citizen of the United States, residing at Ironton, in the county of Lawrence and State of Ohio, have invented certain new and useful Improvements in Door Structures, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to certain improvements in door structures and has relation more particularly to a structure of this general character especially designed and adapted for use in mines and it is an object of the invention to provide a novel and improved structure wherein a door is mounted The invention consists in the details of construction and in the combination and arrangementof the several parts of my improved door structure whereby certain 1mportant advantages are attained and the device rendered simpler, less expensive and votherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying drawings, wherein Figure l is atop plan view of my im;

proved mine door structure Figure 2 is an elevation of the frame and of the doors; 7

Figure 3 is a perspective view of one of the doors looking toward one face thereof; Figure 4: is a section on the line 44: of

Figure 2;

Figure 5 1s a fragmentary elevation look- Serial No. 659,010.

ing at the opposite side of the door from 7 that shown in Figure 3;

Figure 6 is an elevation of the lower portionof the door and its supporting structure showing the ball bearings of the door in section;

'-Figure 7 Figure 2;

As disclosed in the accompanying drawis a section on the line 7--7 of ings, M denotes a mine level tunnel or other passage way upon the floor of which is disposed a trackway T for thetravel of mine cars or kindred rolling stock.

My improved door structure is adapted to be positioned within the level M or the like at such points desired but for the purpose of disclosure only a single structure is disclosed.

My improved structure comprises a frame structure S positioned within the level M or the like and disposed transversely thereof. As herein disclosed the frame S consists of a bottom sill 1 extending below the trackway T and extending a desired distance beyond each side of said 'traokway. The extremities of the sill 1 have extended upwardly therefrom the posts 2 of desired height, the upper end portions of said posts; being connected by a top cap or beam 3.

Arranged at opposite sides of the track- Way T are the vertically disposed posts 4:

preferably piping and said posts have their opposite end portions in threaded engagement with'the plates 5 and 6. The lower plate 5 is suitably engaged with thesill 1 while the upper plate Sis engaged withthe top cap or beam 8.

Associated'with each of the posts A is a frame F. This frame F comprises a vertically disposed rear member 7 and the upper and lower members 8 and 9. The upper member 8 is of a length materially greater than that of the lower member ,9' and each of the members '8 and 9 is pivotally con nected as at 10 with the posts t through the instrumentality of a bearing 11, said bearing being to one side of the member 8 or 9.

The lower bearing 11 has co-a'cting'therewith suitable anti-friction means 12 whereby the frame F may be caused to swing with a minimum of frictional resistance with'respect to'its associated post l.

The upper member 8 of each of the frames F is substantially U-shaped in cross section with the side flanges 14 thereof downwardly disposed and the lower marginal portions of said flanges 1e are defined" by the inwardly directed flanges 15 provided along their opposed marginal portions with the up.- standing flanges 16. Arranged at spaced points lengthwise of each of the flanges 15 and rotatably supported by the flanges 1e and 16 are the rollers 17, the upper portions of said rollers being disposed above the free longitudinal margin of the flanges 16. V i

The lower member 9 is also of substan tially il-shaped construction in cross section with its side flanges 18 upwardly disposed.

Associated with each of the frames F is a solid door D of sheet steel or other suitable material the upper marginal portion of the door being freely received between the flanges 16 and provided along its top with the oppositely directed flanges 18 resting upon the rollers 17 whereby the door D may have free sliding movement with respect to the frame F yet having swinging moren'ient with said frame. The outer portion of the lower margin of the door D is also received between the flanges 18 of the lower member 9 whereby it is assured that the door D will be maintained in proper position with respect to the frame F. The inner portion of the lower margin of the door D is cut away as at 19 a distance sufficient to permit the door when in its normal position to properly extend over the trackway T and such lower portion of the door D has suitably secured thereto a sub-frame 20.

lihe inner vertical marginal portions of ed to contact as will hereinafter be more par-' ticularly referred to.

Extending rearwardly and outwardly from opposite sides of the upper portion of the member 7 of each of the frames F are the arms or brackets 22 to each of which is secured an extremity of flexible member 23, each of said members being disposed over a guide roller or pulley 24 carried by the upper portion of the adjacent post 2. The members 23 extend downwardly a predetermined distance below the guide rollers or pulleys 24 and are connected to a single cable 25. Attached to the lower portion of the cable 25 is a weighted member 26 which serves to normally maintain the frame F substantially at right angle to the adjacent portion of the trackway T.

Each of the doors is constantly urged outwardly through the medium of a weighted member 27. This member 27 is secured to a flexible member 28 extending upwardly adjacent to a post t. and passes over a guide roller or pulley 29 carried by the upper por t on of said post.

the door D and secured thereto. By this means the door D is constantly urged :outwardly so that under normal conditions of the door it is properly disposed across the trackway T.

As before stated the weighted members 26 serve to hold the frames F and the doors D carried thereby across the trackway T and also to hold the doors D or more particularly the frames F against swinging movement under the influence of air pressure within the mine level or kindred passage way. 7

The rear portion of each of the doors D comprises an extended part 31 referablyof tin whereby the weightof a door in its entirety is materially reduced.

' As the car travels over the trackway T in either direction it will strike the doors D or more particularly the buffers 21 whereby the doors will properly swinginto open position to permit the desired passage therebetween of the car. In the event it should be necessary to stop the car when passing between the doors D and back up, this desired opera tion may be readily accomplished because when the car is between the doors the inner vertical edges thereof will be in contact with the sides thereof and as the car travels rearwardly the doors D willbe forced inwardly of the frames F sufficiently until the frames F together with the doors are free to swing in'the requisite direction to permit an unobstructed travel of the car and after the car is free of the doors, the second weighted members 27 will automatically move the doors outwardly While the weighted members 26 will return the frames F to-.

gether with the doors D to their normal position.

From the foregoing description it is thought to be obvious that door structure constructed in accordance with. my invention 1. A door structure comprising a frame,

'means for supporting the frame for swinglng movement, means for holding said frame in a predetermined position, a door slidably supported by the frame, and means for urg- The flexible member 28 is then directed toward the-rear portion of ing said door to its outermost position with respect to the frame.

2. A door structure comprising a frame, means for supporting said frame for swinging movement, means for normally maintaining the frame in a predetermined position, a sliding door carried by the frame, automatic means to maintain the door in closed position.

3. A door structure comprising a frame, means for supporting said frame for swinging movement, automatic means for normally maintaining the frame in a predetermined position, a door slidably supported by the frame, and automatic means for normally maintaining the door at the limit of its sliding movement in one direction.

i. A structure of the class described comprising a post, a frame supported by the post for swinging movement, a door slidably supported by the frame, afiexible member secured to the rear portion of the door,

a guide carried by the post with which the V flexible member engages, and a weighted member secured to the flexible member, said weighted member and flexible member operating to normally maintain'the door at the I limit of its sliding movement in one direction. 5. A structure of the class described comprising a frame, means for supporting the frame for swinging movement, oppositely disposed arms oarriedby the frame, flexible I supported at opposite sides of the trackway for swinging movement, meansfor normally maintaining said frames in alignment and disposed in a direction across the trackway, sliding doors carried by the frames, and means for automatically moving the doors one toward the other.

In testimony whereof I hereunto my signature.

VOLEY A. J OHNSON.

V40 6. In combination with a tra-ckway, frames 

